27 Euterpe

Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 27 Euterpe | image = {{#invoke:InfoboxImage|InfoboxImage|image=27Euterpe (Lightcurve Inversion).png|upright={{#if:||1.1}}|alt=}} | caption = Lightcurve-based 3D-model of Euterpe | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery<ref name="jpldata" />

| header10 = {{#if:|Designations|Designations}}

| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="jpldata" />

| data21 = | data22 = {{#if:4 September 2017 (JD 2458000.5) |Epoch 4 September 2017 (JD 2458000.5)}} | data23 = {{#if:0 | Uncertainty parameter 0}} | label24 = Observation arc | data24 = 163.48 yr (59,711 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 2.7524 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 1.9401 AU | label28 = Peri{{#if:|{{{apsis}}}|apsis}} | data28 = | label29 = {{#switch:{{{apsis}}} |helion|astron=Ap{{{apsis}}} |Apo{{#if:|{{{apsis}}}|apsis}}}} | data29 = | label30 = Periastron | data30 = | label31 = Apoastron | data31 = | label32 = Template:Longitem | data32 = 2.3463 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.1731 | label35 = Template:Longitem | data35 = 3.59 yr (1,313 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 170.66° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 1.5837° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 94.789° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 356.55° | label46 = Template:Nowrap | data46 = | label47 = Satellite of | data47 = | label48 = Group | data48 = | label49 = {{#switch: |yes|true=Satellites |Known satellites}} | data49 = | label50 = Star | data50 = | label51 = Earth MOID | data51 = | label52 = Mercury MOID | data52 = | label53 = Venus MOID | data53 = | label54 = Mars MOID | data54 = | label55 = Jupiter MOID | data55 = | label56 = Saturn MOID | data56 = | label57 = Uranus MOID | data57 = | label58 = Neptune MOID | data58 = | label59 = T_Jupiter | data59 =

| header60 = Proper orbital elements

| label61 = Template:Longitem | data61 = {{#if: |{{{p_semimajor}}} AU}} | label62 = Template:Longitem | data62 = | label63 = Template:Longitem | data63 = | label64 = Template:Longitem | data64 = {{#if: |{{{p_mean_motion}}} deg Template:\yr}} | label65 = Template:Longitem | data65 = {{#if:|{{#expr:360/1 round 5}} yr
({{#expr:365.25*360/1 round 3}} d) }} | label66 = Template:Longitem | data66 = {{#if:|{{{perihelion_rate}}} arcsec Template:\yr }} | label67 = Template:Longitem | data67 = {{#if:|{{{node_rate}}} arcsec Template:\yr}}

| header70 = Template:Anchor{{#if:yes| Physical characteristics|Physical characteristics}}

| label71 = Dimensions | data71 = 124 × 75 km Template:Small<ref name="jpldata" />
Template:Val km<ref name="jpldata" />
Template:Val km<ref name="Shevchenko-2006" />
Template:Val km<ref name="Carry-2012" />
Template:Val km<ref name="AKARI" />
Template:Val km<ref name="Morrison-1979" />
Template:Val km<ref name="WISE" /> | label72 = Template:Longitem | data72 = | label73 = Template:Longitem | data73 = | label74 = Template:Longitem | data74 = | label75 = Template:Longitem | data75 = | label76 = Flattening | data76 = | label77 = Circumference | data77 = | label78 = Template:Longitem | data78 = | label79 = Volume | data79 = | label80 = Mass | data80 = Template:Val<ref name="Carry-2012" /> | label81 = Template:Longitem | data81 = Template:Val<ref name="Carry-2012" /> | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = | label85 = Template:Longitem | data85 = Template:Val h<ref name="lcdb" />
Template:Val h<ref name="Gandolfi-2009" />
Template:Val h<ref name="Hanus-2016a" />
Template:Val h<ref name="lcdb" />
Template:Val h<ref name="Pilcher-2011c" />
Template:Val h<ref name="Stephens-2012a" />
Template:Val h<ref name="Stephens-2001a" /><ref name="Stephens-2001b" />Template:Efn
Template:Val h<ref name="geneva-obs" /> | label86 = Template:Longitem | data86 = | label87 = Template:Longitem | data87 = | label88 = Template:Longitem | data88 = | label89 = Template:Longitem | data89 = | label90 = Template:Longitem | data90 = | label91 = Template:Longitem | data91 = | label92 = Template:Longitem | data92 = | label93 = {{#if:yes |Template:Longitem |Albedo}} | data93 = Template:Val<ref name="Mainzer-2011" />
Template:Val<ref name="WISE" />
Template:Val<ref name="Masiero-2014" />
Template:Val<ref name="AKARI" />
Template:Val<ref name="Shevchenko-2006" /> | label94 = Temperature | data94 =

| data100 = {{#if:|

Surface temp.	min	mean	max
{{{temp_name1}}}
{{{temp_name2}}}
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| label101 = Surface absorbed dose rate | data101 = | label102 = Surface equivalent dose rate | data102 = | label103 = Template:Longitem | data103 = Tholen = S<ref name="jpldata" />
SMASS = S<ref name="jpldata" />Template:·S<ref name="Belskaya-2017" /><ref name="lcdb" />
B–V = 0.878<ref name="jpldata" />
U–B = 0.502<ref name="jpldata" /> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = | label106 = Template:Longitem | data106 = 7.00<ref name="jpldata" /><ref name="lcdb" /><ref name="Shevchenko-2006" /><ref name="AKARI" /><ref name="WISE" />Template:·Template:Val<ref name="Stephens-2012a" /> | label107 = Template:Longitem | data107 = 0.13" to 0.035"

| header110 = Atmosphere

| below = {{#if:||Template:Reflist }}

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27 Euterpe is a stony asteroid and parent body of the Euterpe family, located in the inner asteroid belt, approximately 100 kilometers in diameter. It was discovered by English astronomer John Russell Hind at George Bishop's Observatory in London on 8 November 1853. The asteroid was named after Euterpe, the Muse of music in Greek mythology.<ref name="springer" /><ref name="MPC-object" />

Euterpe is one of the brightest asteroids in the night sky.<ref name="MPC-bright-MPs-2004" /> It had an apparent magnitude of 8.5 during a perihelic opposition on 25 December 2015 when the asteroid was about 1 AU from Earth.<ref name="Horizons2015" /> At the end of November 2022 it passed about 1.5 degrees from Uranus while in the constellation of Aries.<ref name="Inthesky2022"/> Based on the S-type spectra the composition appears stony. It has a cross-section size of around 100–120 km. 27 Euterpe is orbiting the Sun with a period of 3.59 years and is spinning on its axis once every 10.4 hours.

It is the parent body of the Euterpe family (Template:Small), a stony inner-belt asteroid family of nearly 400 known members.<ref name="Ferret" /><ref name="Nesvorny-2014" />Template:Rp Euterpe has been studied by radar.<ref name="detected" />